Smoke-consumer.



S. P. MUNN.

SMOKE CONSUMER. Arrucknon FILED AUGJI. 19H.

1,301,588, Patented Apr. 22, 1919.

2 SHEETS-SHEET I.

Inventor":

S. P. MUNN.

SMOKE CONSUMER.

APPLICATION FILED AUG.2I. 1911.

1 ,301 ,588. Patented Apr. 22, 1919.

F 0 r. 3 I 4 Z SHEFTS-SNEET 2.

i I I lAll 1? WI III] UNITED STATES PATENT OFFICE.

SAMSON P. MUNN, 0! 8'1:- LOUIS, MISSOURI, ASSIGNOR 0F FIFTY-FIVEONE-HUNDBEDTHB 'IO JUSTIN '1. FLINT, OF ST. LOUIS, MISSOURI.

SMOKE-CON SUMEB.

To all whom it may concern Be it known that I, SAMSON P. MUNN, a citizenof the United States, residing at the city of St. Louis, in the State ofMissouri, have invented certain new and useful Improvements inSmoke-Consumers, of which the following is a specification.

This invention relates to smoke-consumers,

and has for its object the elimination of objectionable features ofcertain devices of that character now on the market and the provi' sionof new means for smoke prevention.

In the accompanying drawings forming part of this s eoification and inwhich like numbers of re erence denote like parts wherever they occur,

Figure 1 is a front elevation;

Fig. 2 is a side elevation, partly in section;

Fig. 3 is a front elevation (partly in section) on an enlarged scale ofpart of the subject-matter of Fig. 1; and

Fig. 4 is an elevation of the same partly in section, the same beingtaken on the line 44 of Fig. 3, viewing in the arrow-indicateddirection.

The furnace 1, boiler 2, stack 3, ashpit 4, grate 5, and firebox 6 maybe of any ordinary or desired construction.

Heretofore, the attempt has been made to supply the fire with warmedsmoke-containing air taken from the stack 3 by a fan, which fan, afterdrawing in such air forces the same into the firebox. This has beenfound very objectionable, because thereby smoke and sulfur fumes areforced out into the furnace-room. The present invention obviates thisdifficulty by drawing in fresh air containing an abundance of oxygen bymeans of fan 7 through the inlet 8 and feeding the same through theoutlet-pipe sections 9 of pipe 10 over the grate 5, the outletpipe-sections passing through the furnace wall. In actual practice, thishas been found to cause instant cessation of emission of smoke from thestack 3 while firing is taking place.

The horizontal pipe 10 disposed transversely of the furnace conducts airover the flame during firing and the vertical pipe 11 conducts air underthe grate 5 during normal operation. Pipe 11 leads from the fan 7 andthe pipe 10 is tapped into the pipe 11.

Damper or valve 12 controls the direction of the passage of air into oneor the other of the said pipes. A rock-shaft 25, rotatably mounted atthe confluence of the pipes 10 and Specification of Letters Eatent.

Patented Apr. 22, 1919.

Application filed August 27, 1917. Serial No. 188,262.

11, is secured to said valve, whereby movement of said shaft will movesaid valve to cut oil passage through said pipe 10 and open passagethrough the pipe 11, or vice versa. One end of a lever 25' is secured toone end of said rock-shaft 25, and one end of a link 13 is pivotallyconnected with said lever intermediate of the length thereof. The otherend of said link has a hinged connection 14 with the upper end of apiston-rod 15 slidably mounted in bearings in a bracket 15 secured tothe furnace wall. The piston-rod is connected with the piston 16 incylinder 17, which is provided with escape ports 18, 19, and 20, and thequick air-intake valve 21. The end of the lever 25 opposite that endwhich is connected with the rock-shaft 25 is provided with a handle 22.One end of a cable 24 is secured to said handle 22, the cable passingover a suitable pulley 24', and carrying, at its other end, a Weight 23.When the piston is forced downwardly at the time when damper 12 isshifted by means of handle 22 from its normal position of closing pipe10 to the firing position of closing pipe 11, leaving pipe 10 open, airis forced out of ports 18 and 19, and air is forced out of port 20 whenthe piston 16 moves in the opposite direction, the weight 23 at oncebeginning to exert a pull toward closing damper 12 against the retardingaction of the air in cylinder 17 above piston 16. The ports 18 and 19are larger relatively than port 20, and allow the quick depression ofpiston 16 and a rapid movement of the valve 12 to open passage throughthe pipe 10, while the escape of air through port 20 when weight 23exerts its force on piston. 16 through cable 24 and rods 13 and 15 iscomparatively slow, thus causing a relatively slow movement of the valve12 and a relatively slow closing of passage through the pipe 10. Thusthe feed of air through pipe 11 to underneath grate 5 can beinstantaneously deflected to over the grate and flame through pipe 10,and the supply of extra oxygen thus furnished to stimulate combustion atthe time of firing is gradually reduced and then shut ed by theslow-closing operation of damper 12 by the action of weight 23 on piston16.

Having thus described this invention, I hereby reserve the benefit ofall changes in form, arrangement, order, or use of parts, as it isevident that many minor changes may either close the open end of thebranch pipeleading from the main pipe, or to close the main pipe, an armextending from the pivot, means including a weight connected to theouter end of the arm to normally operate the dam r to close the branchpipe, and means connected to the arm for permitting of quick operationof the damper to close themain pipe and open the branch pipe to permitair from the fan to pass to the fire box, said means preventing thequick movement and permitting the slow movement of the damper to closethe branch pipe under the influence of the weight and open the main pipeto permit air to pass from the fan to the ash pit.

2. In combination, a furnace including a fire box, grate and ash pit, afan, a main pipe leading from the fan to the ash pit, a branch Eipeconnecting the main pipe and the fire x, a pivot adjacent the junctureof the main and branch pipes, a damper mounted on the pivot and adaptedto be swung to either close the open end of the branch pipe leading fromthe main pipe, or to close the main pipe, an annextending from thepivot, a rod connected to the arm, a piston on the rod, a cylinder inwhich the piston operates, said cylinder having a small vent opening atits upper end and larger openings at the op- .posite end, and a valve inthe upper end of the cylinder, whereby when the arm is moved down thedamper quickly opens the branch pipe and closes the main pipe, the airbeing forced from the cylinder through the large openings below thepiston, the weight acting to return the damper to open the main pipe andclose the branch pipe, the air in the cylinder above the piston beingforced through the small openings at the upper end of the cylinderthereby permitting the slow movement of the damper.

In testimony whereof I hereunto aflix my signature.

SAMSON P. MUNN.

